Improved Photocatalytic Performance for Rhodamine B Degradation by Porous Zn2SnO4 Prepared with Carbon Black as a Pore-Forming Agent

Silvestri, Siara; dos Santos Trentin, Roberta; da Silveira Salla, Julia; Foletto, Edson Luiz

Improved Photocatalytic Performance for Rhodamine B Degradation by Porous Zn2SnO4 Prepared with Carbon Black as a Pore-Forming Agent

2019

Silvestri, Siara | dos Santos Trentin, Roberta | da Silveira Salla, Julia | Foletto, Edson Luiz

Hydrothermal synthesis followed by a calcination step was used to prepare porous Zn₂SnO₄ powders using carbon black as a pore-forming agent. The porous Zn₂SnO₄ was used as a photocatalyst to degrade the Rhodamine B dye from aqueous solution under UV artificial light. X-ray diffraction, N₂ adsorption-desorption isotherms, and UV-Vis diffuse reflectance were used to characterize the material. The addition of pore-forming agent (carbon black) did not change the crystalline structure of Zn₂SnO₄ phase. In addition, increasing the surface area and porosity as well as decreasing the band-gap energy was observed. The combination of these characteristics favored the photodegradation of Rhodamine B, reaching 96% of dye degradation at 15 min of reaction time. In addition, the photocatalyst was active after six cycles of reuse. Therefore, the produced material in this work showed to be a potential photocatalyst to remove Rhodamine B dye from aqueous solution.

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